As AndyF pointed out the motor will make heat based on the HP it makes, a 650 HP SS 440 6 pack motor will make as much heat as 600 HP low compression stroker 526 CI RB motor will make as long as the casting are close on the same thicknesses up twocents
More HP = more BTU in heat to cool shruggy wrench work

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)